NonIC'd KSB power

[bgilbert]

Ok this question is concerning my crew cab with a 90 nonIC'd motor and injection pump on the operation of the early KSB. Up to this point I haven't powered the KSB. Today I wired 12V to the KSB and obviously the motor sounded much smoother, nicer and quieter. I'm somewhat sure in the early ksb setups, you at least have power to the ksb until the sensor in the coolant port or intake reaches a set temp. My question, I think, is, would it hurt to have 12V to the ksb all the time while the motor is running? This would be easy to acheive, jump wire from the shutdown solenoid terminal down to the ksb terminal.

[dpuckett]

The early KSB is activated with a lack of power, so leaving it unhooked will advance it; running power to it will retard it. The latter pumps are the opposite.

Do what I did- run a wire from the shutdown solenoid to a switch in the cab, then back to the KSB solenoid.

Or just power it up all the time. Contrary to popular belief, it IS possible to get too much advance.

Daniel

[JD730]

The early KSB is activated with a lack of power, so leaving it unhooked will advance it; running power to it will retard it. The latter pumps are the opposite.

Do what I did- run a wire from the shutdown solenoid to a switch in the cab, then back to the KSB solenoid.

Or just power it up all the time. Contrary to popular belief, it IS possible to get too much advance.

Daniel

Yup, thats how the old wax motor KSB's work.

I don't think the advance is really the problem. When the KSB is active the internal pump pressures are much higher, at idle 80psi with it off, 150psi with it on. Bring the rpm's up and it will easily exceed 200psi with no load.

[bgilbert]

The way I understood it was the same as you two described it, UNPLUGGED. But when plugged in it will energize it to run NORMAL timing, not advanced, not retarded. I guess I'll just jumper a wire from the the run solenoid down to the ksb for now.

[dpuckett]

You got me- unplugged gives you normal timing. I meant retarded being in relation to plugged in. That's what I get for trying to multi task.

DP

[BEARKILLER]

I guess I'll just jumper a wire from the the run solenoid down to the ksb for now.

I have absolutely no understanding as to why, even though many have stretched their patience thin trying to beat it into my head, BUT, when we put the engine in my Ford, we did just that = tie the KSB wire directly to the shut-down solenoid wire terminal; my KSB has power all the time that the solenoid has power.

On the other hand, one of my other non-IC engines has had NO wire connected and starts/runs as well as any; in fact, about half the engines I have opportunity to see have no wire connected at the KSB.


The next pump I have apart, when the guts are exposed, I intend to connect a battery to the pump and observe just what happens.